The structure of Ext(A,Z) and GCH: possible co-Moore spaces

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We consider what Ext(A,Z) can be when A is torsion-free and Hom(A,Z)=0. We thereby give an answer to a question of Golasinski and Goncalves which asks for the divisible Abelian groups which can be the type of a co-Moore space.

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Logic, Group Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/66918

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0303344
 http://arxiv.org/abs/math/0303344
 Mathematische Zeitschrift, 239 (2002), 143-157

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arXiv